Incorrect CRC hash for shared fragments with FInstancedStruct member

User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the CRC hash for such fragments—changes to the FInstancedStruct member do not affect the resulting hash value. As a result, when creating a shared fragment in a trait using EntityManager.GetOrCreateConstSharedFragment(), only a single entry may be generated, even if multiple Mass configs exist that differ solely in the FInstancedStruct member variable.

User has provided a repro project (see addl info URL). Using the third person example project:

User has also provided a code snippet to support the following repro steps:

• Create a blueprint type ustruct & name it FInstancedStructBase with an FName uproperty.

• Create two child structs FInstancedStructBool & FInstancedStructFloat. Add a uproperty of the respective type to each child struct.

• Create another struct of type FMassConstSharedFragment named FTestConstSharedFragment . Add a uproperty of type FInstancedStruct with the BaseStruct metadata set to the appropritate type.

• Create a child class of UMassEntityTraitBase. add a uproperty of FTestConstSharedFragment type named params.

• Override the BuildTemplate function. inside the override, Get the entity manager & call GetOrCreateConstSharedFragment using params.

• Then use UE::StructUtils::GetStructInstanceCrc32(FConstStructView::Make(Params)) and output the result of that function.

• In the content browser create two MassEnityConfigAsset's

• Add your Test Trait to each config. Modify the value in the instanced struct of each trait, ensuring they have unique values.

• Modify your player controller, adding an array of MassEnityConfigAsset's natively.

• Add the two mass configs as the default value.

• on begin play, call GetOrCreateEntityTemplate(*GetWorld()) on each asset.

• Observe in the output log that the hash values for each trait's parameters are the same.